<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        div{
            width: 400px;
            height: 300px;
            background-color: yellow;
            width: 100vw;
            height: 100vh;
        }
        div>img{
            width: 150px;
            width: 100%;
        }
        h1{
            color: red;
            color: rgb(255, 0, 0);
            color: rgb(0, 255, 0);
            color: rgb(0, 0, 255);
            color: rgb(0, 0, 0);
            color: rgb(128, 128, 128);
            color: rgb(255, 255, 255);
            color: #f00;
            color: #0f0;
            color: #00f;
            color: #080808;
            color: #fff;
        }
        div{
            width: 100px;
            height: 100px;
            border: 5px solid #000;
        }
        .d1{
            background-color: rgba(255, 0, 0, 1);
        }
        .d2{
            background-color: rgba(255, 0, 0, 0.8);
        }
        .d3{
            background-color: rgba(255, 0, 0, 0.4);
        }
        .d4{
            background-color: rgba(255, 0, 0, 0.2);
        }
        .d5{
            background-color: rgba(255, 0, 0, 0);
        }
        #bgi{
            width: 500px;
            height: 500px;
            background-image: linear-gradient(130deg, red, cyan);
        }
    </style>
</head>
<body>
    <div class="d1"></div>
    <div class="d2"></div>
    <div class="d3"></div>
    <div class="d4"></div>
    <div class="d5"></div>
    <div>
        <img src="../2.png">
    </div>
    <div id="bgi">

    </div>
</body>
</html>